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Suppl. Figure S3: Kinetics of CO 2 evolution during the post- illumination period in mmdh mutants. Leaves were kept under photorespiratory conditions (PPFD = 1000 μmol.m -2.s -1 ; 100 ppm CO 2 ) and were then shifted to the dark. The light was turned on again when a steady-state was reached. The transient peak measured in the first seconds of the dark period results from the decarboxylation of the large glycine pool built up under photorespiratory conditions, a phenomenon known as the post-illumination burst (PIB). After the peak, the rate of CO 2 evolution increases slowly and reaches a steady-state after several minutes. The period of increased respiration is termed light-enhanced dark respiration (LEDR). The rate of CO 2 evolution was recorded every two seconds. Three representative kinetics are shown for each genotype.